Agree fully with purdyd on this one, the pitch and yaw will be impacted the same.
A really interesting question though, as what is the difference beteween long fuselage small stab and short fuselage bigger stab?
Well, in terms of stability, the longer fuselage will have benefits, because it is out (further away) of the main wing and mast turbulences, and also free of the downwash flow.
But a short fuselage will no doubt be able to give you a sharper turn without stalling the stab, or at least push the stab harder for some instants, without stalling.
In terms of performance, the longer fuselage and small stab should have less drag in theory, BUT, as the fuselage dont ride low drag at all AOA's, this is probably not true.
AND, if you can use a small stab, AND a shorter fuselage, the best performance is obtained, if sufficiently stable (as stability in itself deliver real world performance).
Back to the freeriders/waveriders, whether the shorter fuselage and ability to turn on a dime without stalling the stab - can it be used or not?
Maybe we can turn so narrow with "normal" fuselages now, that it wont give us anything?
Or maybe the shorter fuselage will be a treat for those who CAN push it super sharp/narrow?
I like to use so small stabs often, that a shorter fuselage AND a small stab, would fit me spot on I think
But dont know, as all above knowledge is worth nothing, compared to having tried it many times, and comparing
A bit similar to the mast position on fuselage, only testing and riding a lot, can find the best overall position (which is what almost everyone uses now, many years later)